Valve-reversing gear



P; QUINN. VALVE REVERSING GEAR.

(No Model.)

Pate n ted June 28 M I. y 0

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NITED STATES PATENT FFICEm VALVE-REVERSING GEAR.

SPECIFICATION forming part of Letters Patent No. 606,358, dated June 28, 1898.

Application filed January 20, 1898. Serial No. 667,306. (No model.)

T at whom it may concern.-

Be it known that I,'FREDERIOK QUINN,a citizen of the United States, residing at Oliver, in the county of Edgar and State of Illinois, have invented certain new and useful Improvements in Valve-Reversing Gears for Steam- Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in valve-reversing gears for steam-engines, and the object is to provide a simple, inexpensive, and effective device for this purpose.

To this end the invention consists in the construction, combination, and arrangement of the several parts of the device, as will be hereinafter more fully described, and particularly pointed out in the claim.

The accompanying drawings show my invention in the best form known to me; but many changes in the details might be made within the skill of a good mechanic, as set forth in the claim at the end of this specification.

The same reference characters indicate the same parts of the invention in both Views.

Figure 1 is a side elevation of a steam-e11- gine, showing my improved valve-reversing gear in position to go ahead. Fig. 2 is a similar View with the valve-gear reversed.

1 represents the boiler, and 2 the engine. 3 denotes the crankshaft, 4 the eccentric, and 5 the eccentric-rod.

6 represents a bracket fixed to the steamdrum 7, and 8 a horizontal shaft journaled in .said bracket. 9 denotes a bell-crank lever fixed on one end of said shaft, and from the shorter arm 10 of said lever a connectingrod 12 extends to the reversing-lever 13, fulcrumcd in the bracket 14, which is formed with a notched segmental rail 15, and 16 denotes a spring-actuated pawl mounted parallel with said hand-lever, its lower end adapt:

cd to engage the notches in the rail and its upper end connected to the hand-grip 17, by which it may be withdrawn from said notches in the act of reversing the engine. The longer arm 18 of the bell-crank lever 9 is pivoted to the outer end of the connecting-rod lf), the opposite end of which is pivoted to a bolt or pin 20, fixed in the outer end of the eccentricrod 5, and from this pin a second connectingrod 21 extends to the valve-stem 22.

As shown in Fig. 1, the pivot-bolt 23, connecting the outer ends ofthe arm 18 and the connecting-rod 19, is a fixed point, and consequently the connecting-rods 19 and 21 form a toggle-joint operated by the eccentric-rod 5, so that when the eccentric is revolving the proper reciprocating movement is imparted to the valve-stem to drive the engine ahead. If, however, the hand-lever be thrown to the position shown in Fig. 2, the position of the valve is reversed and the proper movement is imparted to it to run the engine in the opposite direction, and when the hand-lever is thrown midway between these points the valve covers both parts and the engine comes to a stop.

Having thus fully described my invention, What I claim as new and useful, and desire to secure by Letters Patent of the United States, 1s-

A valve-reversing gear,com prising the rockshaft 8, the bell-crank lever 9, the connectingrod 19 connecting the longer arm 18 of said lever 9 with the valve-operating rod 21, means for securing said bell-crank lever in two or more fixed positions and the eccentric-rod 5 pivoted to the contiguous ends of said rods 19 and 21, as and for the purpose set forth.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

FRED. QUINN.

WVitnesses:

'W. H. OWEN, En. STEP. 

